Compilare: main.cpp: In function 'int main()': main.cpp:67:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &t ) ; ^ main.cpp:69:37: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d\n", &n, &m ) ; ^ main.cpp:66:8: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized] char c ; ^